calcurse.c: Pull out key_move_*()
calcurse.c: Pull out key_move_*()

Supersedes the "key" parameter from following functions:

* key_generic_prev_day()
* key_generic_next_day()
* key_generic_prev_week()
* key_generic_next_week()

Signed-off-by: Lukas Fleischer <af90e31281d8305af43dc616c5aaca3c7165f8a7@cryptocrack.de>

lfos/calcurse,lfos/calcurse,lfos/calcurse